A: (1, 2, 3)
B: (7, 3, 1)
f = Line(B, A)
C: (15, 10, 8)
D: (27, 12, 4)
g = Line(C, D)
E = Point(yAxis)
F = Intersect(yAxis, zAxis)
G = Point(zAxis)
p = Plane(E, F, G)
H = Point(xAxis)
q = Plane(F, H, G)